Eyeglasses.



PATENTED NOV. 17, 1903.

E. W.- BANGROPT.

EYEGLASSES. APPLICATION FILED FEB. 14, 1903.

no MODEL.

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UNITED STATES Fatented November 1' 7, 1901;.

PATENT OFFICE.

EYEGLASSES.

SPECIFICATION forming part of Letters Patent No. 744,278, dated November 17, 1903.

Application filed February 14, 1903. Serial No. 143,336. (No model.)

To all whom it may concern:

Be it known that I, EDWIN W. BANCROFT, a citizen of the United States, residing in Passaic, in the county of Passaic and State of New Jersey, have invented a certain new and useful Improvement in Eyeglasses, of which the following is a specification.

The invention relates to means for securing the spring and guards to the posts and also for attaching the latter to the lenses. By reason of the smallness and delicacy of the parts it is difficult to attach the spring and guards to the posts with the required firmness to resist the comparatively severe strains to which these parts are subjected in service without making them so large as to detract from the appearance,and in all the forms before known to me there has been a liability of the joints to work loose, resulting in discomfort and annoyance to the wearer and danger of accident to the glasses.

The object of this invention is to provide a fastening which shall be light, strong, and reliable, maintaining its rigidity under allconditions, and which shall also be 'neat and attractive in appearance.

The invention consists in certain details of construction and arrangement, by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show the invention as I have carried it out.

Figure 1 is a face view of'a pair of frameless glasses constructed in accordance with the invention and showing a preferred form of strap by which the posts are secured to the lenses. Fig. 2 is a corresponding view, on'a larger scale, of one of the straps and its post alone. Fig. 3 is a corresponding view of the same parts seen from above. Fig. 4 is an end view of the post. Fig. dis a sectional elevation of the spring, and Fig. 6 is a face view of one of the guards. Fig. 7 is a view of the screw which engages the head and post detached. Fig. 8 is an elevation showing the completed fastening. Fig. 9 is a section, partly in elevation, on a still larger scale, the plane of section being indicated by the line 9 9 in Fig. 8; and Fig. 10 is a corresponding section on the line 10 10 in the same figure.

Fig. 11 is a face view of a pair of glasses similar to Fig. 1, but showing a modification in the mode of attaching the posts and straps to the lenses. 9

Similar letters of reference indicate like parts in all the figures. A-A are thelenses, each equipped with a strap B, shown in Fig. 1 as having two yokes or clamps B B embracing the margin of'the lens at two points and secured thereto by screws B extending through the leaves of the yokes and corresponding holes in the lens. The strap may be a strip of metal of uniform thickness; but I prefer to provide a reinforcement or thickening along the central portion of the length, as indicated at B to better resist strains on the lens tending to straighten the strap and reduce the engagementof the latter with thelens. The construction and arrangement for both lenses are each the counterpart of the other, and a description of one lens and its attachments will suffice. The post 0 is at about the mid-length of the strap and tapers gradually toward the head 0, which is larger than the body of the post and preferably rectangular, with its face in a plane at a right angle to the axial line of the post. The head is provided on the two vertical sides with an upturned lip or flange O and the head and post are drilled and tapped axially at c to receive a screw D, having a slightly-rounded head of large diameter. Immediately above and below the hole 0 is set a pair of studs 0 0 shown as pins, projecting from the face of the head standing on the central line between the flanges and extending outwardly nearly the same distance as the flanges. The pins are preferably held by soldering them in small holes drilled to receive them.

The spring E and guards F F may be of any approved styles and differ from the usual are also of a width to be received between the flanges (J C and are preferably rounded at the ends to produce a finished appearance.

The parts are assembled by first applying the spring end E within the flanges C C and engaging the studs G 0 in the holes e e. The guard is next similarly applied and engaged and then the screw D inserted and driven firmly home to bind all the parts firmly together, the large head D of the screw ofiering an extended area of pressure and serving to conceal the ends of the studs and their holes in the guard-arm and also providing a smooth nearly flat surface not liable to abrade the skin, if accidentally brought in contact therewith. The combined thickness of the spring end and guard-arm is a trifle greater than the studs G and flanges 0 so that the pressure exerted by the screw is received by the guard and spring and transmitted directly to the face of the head 0. Thus constructed all movements of any of the parts relatively to the others are successfully resisted, and especially torsional strains on the post relatively to the guard and spring, to which the fastening is most subject and which is the usual cause of looseness in the connection by inducing slight movements of the screw in the direction to slacken. In my improved form the screw serves merely to hold the parts in contact, the strains being received on fixed portions of the post, shown as the studs 0 Modifications may be made in the forms and proportions of the several parts without departing from the invention, and parts may be used without the whole.

The invention will serve successfully without the flanges G I prefer to employ them because of the better finish they afford.

The location of the studs is not important. They may be arranged difierently than here shown. The farther they are placed from the hole a the greater resistance they will offer to torsional strains, and by arranging them parallel with the flanges the metal of the spring end and guard-arm is not weakened, as it would be with a transverse arrangement. One of the studs may be omitted or the shape modified, requiring corresponding changes in the openings in the guard-arm and spring end to match thereto. Instead of the three holes shown in these portions a single slot having a large central opening to receive the screw and narrow ends adapted to receive the studs may be employed, if preferred.

A short strap B, with a single yoke B as shown in Fig. 11, may be preferred in many cases on account of the lighter appearance. In this form the reinforcement B is of greater importance, for the reason that strains on the lens tending to partially rotate it in the yoke are delivered directly against the ends of the strap and are resisted by its stiffness alone. The double fastening shown in Fig. 1 is preferred.

I claim 1. In a fastening for eyeglasses, a post having a screw-hole in its end, and upturned flanges, a spring and guard each having an opening therethrough matching said screwhole, a screw extending through said guard and spring and into said screw-hole, and a stud on said post extending through closelyfitting openings in said spring and guard and serving to hold them in position on said post and a screw having a head covering the end of the stud and overlapping said flanges.

2. In a fastening for eyeglasses, a post having ahead, a screw-hole in said head and post, a spring and guard each having an opening therethrough matching said screw-hole, a screw extending through said guard and spring and into said screw-hole, serving to hold said guard and spring to said head, and a stud on said head adjacent to said screwhole and extending through closely-fitting openings in said spring and guard and serving to hold them against movement on said screw, the combined thickness of the spring and guard being greater than said stud and flange and the screw having an enlarged head covering said opening and stud.

3. In a fastening for eyeglasses, a post having a head, a screw-hole in said head and post, a spring and guard each having an opening therethrough matching said screw-hole, a screw extending through said guard and spring and into said screw-hole, serving to hold said guard and spring to said head, and a pair of studs on said head located on opposite sides of said screw-hole and extending through corresponding closely-fitting openings in said spring and guard and serving to hold them against movement on said screw, the combined thickness of the spring and guard being greater than the studs and covering the sameand their openings.

4. In a fastening for eyeglasses, a strap adapted to be secured to a lens, a post 0 on said strap, a head 0 on said post having flanges C O on its sides, a screw-hole c in said head and post, a springEhavingits end E shaped to lie on said head between said flanges, and having an opening e matching said screw-hole, a guard F having its arm F shaped to lie upon said spring end between said flanges and having an openingf matching to said opening a and to said screw-hole, a screw D extending through said arm and spring end into said post, and the studs 0 0 set in said head on opposite sides of said screw-hole, and openings 6 e in said spring end, and openingsf f in said arm matching to and receiving said studs.

5. In a fastening for eyeglasses, the strap B having two yokes B B adapted to receive a lens and be secured thereto at two separated points, a reinforce B serving to stiifen said strap, a post 0 on the latter, a head 0 on said post having flanges C 0 011 its sides, a screw-hole c in said head and post, a spring e e in said spring end, and openings ff' in 10 said arm matching to and receiving said studs, a screw D extending through said spring end and arm into said screw-hole, and the head D on said screw adapted to hold said spring end and guard to said post and serving to conceal said studs and their openings in said guard-arm.

In testimony that I claim the invention above set forth I aflix my signature in presence of two Witnesses.

EDWIN W. BANGROFT.

Witnesses:

CHARLES R. SEARLE, W. E. PARTRIDGE. 

